Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai-kubra:4322 – Muḥammad b. ʿAbdullāh b. ʿAbd al-Ḥakam > Shuʿayb > al-Layth > ʿUbaydullāh b. Abū Jaʿfar > ʿUrwah > Abū Murāwiḥ > Abū Dhar

"Belief in Allah and Jihad in the cause of Allah, the Mighty and Sublime." (Using translation from Nasāʾī 3129)  

الكبرى للنسائي:٤٣٢٢ – أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللهِ بْنِ عَبْدِ الْحَكَمِ عَنْ شُعَيْبٍ عَنِ اللَّيْثِ عَنْ عُبَيْدِ اللهِ بْنِ أَبِي جَعْفَرٍ قَالَ أَخْبَرَنِي عُرْوَةُ عَنْ أَبِي مُرَاوِحٍ عَنْ أَبِي ذَرٍّ

أَنَّهُ سَأَلَ نَبِيَّ اللهِ ﷺ أَيُّ الْعَمَلِ خَيْرٌ؟ قَالَ «إِيمَانٌ بِاللهِ وَجِهَادٌ فِي سَبِيلِ اللهِ»  

See similar narrations below:

Collected by Nasāʾī, Suyūṭī
nasai:3129 – Muḥammad b. ʿAbdullāh b. ʿAbd al-Ḥakam > Shuʿayb > al-Layth > ʿUbaydullāh b. Abū Jaʿfar > ʿUrwah > Abū Murāwiḥ > Abū Dhar

"Belief in Allah and Jihad in the cause of Allah, the Mighty and Sublime."  

النسائي:٣١٢٩ – أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ عَبْدِ الْحَكَمِ عَنْ شُعَيْبٍ عَنِ اللَّيْثِ عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي جَعْفَرٍ قَالَ أَخْبَرَنِي عُرْوَةُ عَنْ أَبِي مُرَاوِحٍ عَنْ أَبِي ذَرٍّ

أَنَّهُ سَأَلَ نَبِيَّ اللَّهِ ﷺ أَىُّ الْعَمَلِ خَيْرٌ قَالَ إِيمَانٌ بِاللَّهِ وَجِهَادٌ فِي سَبِيلِ اللَّهِ ﷻ